Bagasse and liquid-fuel furnace



@8 0. 25 fl923; 3,,478Al8 R. ALMAGRQ BAGASSE AND LIQUID FIJEL FURNACE Filed June es 1922 5 Sheets-Sheet l W, Z J 5 k "m rm 4\ n w. 0 m 2 V/////////// 13 Dec. 25, 1923. HAWAW R. ALMAGRO BAGASSE AND LIQUID FUEL FURNACE Fild June 29. 1922 2 Sheets-Sheet z W F g.2.

ll II II I Patented Dec. 25, 1923.

ROBERTO ALMAGR-O, or HABANA, CUBA.

BAGASSE AND LIQUEEJ-FUEL FURNACE.

Application filed June 29,

To all whom it may concern:

Be it known that I, ROBERTO ALMAeRo, a citizen of the Republic of Cuba, residing at l-labana, Republic of Cuba, have invented certain new and useful Improvements in a Bagasse and Liquid-Fuel Furnace, of which invention the following is a complete specification.

'lhis invention relates to furnaces which burn bagasse and a liquid fuel such as petroleum in different lire-places and has for its principal object to provide a furnace of such construction that there are included in the same several improvements which allow the most thorough cleaning of the furnace, greater and more uniform heating of the boilers and prove favorable to the preservation of the same.

An object of the invention is the disposition of the-fire-places in respect to the principal body of the furnace within which are tunnel is provided with damper doors which permit the cleaning of the front part of the furnace and damper doors which permit the cleaning of the rear part of the furnace.

A further object of the invention is to provide in the construction of the furnace such a disposition as will permit that the gases from burning, proceeding from the fire laces wherein bagasse is burned, are lead and distributed at their outlet from said fire place towards ash pits located behind the fire place for burning liquid fuel and from thence continue their circulation over the fire bridges towards the rear part of the furnace.

A further object of the invention is a disposition in the rear wall or back of the furnace which facilitates the better gathering of the residues of the combustion.

Another object of the invention is the inclined disposition of the rear wall of the fire place for burning bagasse with a view to facilitating the leading of the gases of combustion towards the outside of the fire place.

More advantages and other considerations 1922. Serial, No. 571,586.

are deduced during the course of this description and with the help of the attached drawings in which the same reference characters designate the same parts.

In the attached drawings:

Figure 1 is a fragmentary front elevation of the furnace.

Figure 2 is a vertical longitudinal section according to the line 2-2 of Figure 1.

Figure 3 is another vertical longitudinal section according to the line 3-3 of Figure 1.

Figure 4 is a horizontal section according to the line l-4 of Figure 2.

In these figures there is represented a furnace A of a cubical shape within which two boilers 1 and 2 are mounted and which is provided at its front part with three fire places; a central fire place 3 for burning bagasseand two fire places t and 5 for burning petroleum on opposite sides of the first and the three in an advanced position with relation to the body of the furnace A which contains the boilers. The fire place for burning bagasse as is usual has its hopper 31 for feeding bagasse, grates 6, ash pit 7, damper door 8' to tire place, damper door 8 for the ash pit and, above the damper door 8' an aperture 9 with its door for feeding wood to the fire place 3. The rear wall 10 of the fire place is inclined as is seen in Fig. 2 in order to facilitate the leading of the burning gases towards the outside of the fire place.

The fire places 4: and 5 for burning petroleum are also provided with their liquid fuel burners 11 and 12, ventilation holes 13 and 14': and dampers 15 and 16.

As is shown by Figures 2 and 3, the fire places 3, 4L and 5 slightly extend inwards of the body of the furnace constituting the rear part of the casings of fire places l and 5 rests for the front part of the boilers 1 and 2 these therefore remaining free of direct contact with the fire places. Behind the fire places 4: and 5 there are ash pits 4i and 5 to which gases proceeding from the fire place 3 for burning bagasse have access through passways 27 formed between the lateral walls of fire place 3 and an extension 27 of partition 26 which separates boilers 1 and 2; the extension 27 separates ash-pits 4i and 5. A small vault 3 covers the space which exists behind fire place 3, being a continuation of cover 3" of said fire place and extending up to the projection lOS 27; therefore the burning gases proceeding from lire place 3 and gathered up under the small vault 3 are distributed and forced towards ashpits l and 5 thru passways 27" as is shown by arrows in Figure 4, the bevbehind fire places 3, a and '5 and on the other side with doors 25 for inspection and cleaning of the rear smoke passages underneath boilers l and 2 to which access is also had through the doors 21, the floor of said passages being inclined or sloping as is shown by 26 to facilitate the better collection of the residues or waste of burning.

Lastly, as is shown by 28, I provide, back of the boilers 1 and 2 a continuous vault, which forms a buffer plate, preventing the burning gases from circulating upwards, but forcing them towards the front of the furnace through the fire flues of boilers 1 and 2.

Of course, there can be introduced some changes in the details of the structure which constitute improvements, therefore I do not limit myself to what has been previously set forth but I desire that Letters Patents should cover the following claims:

1. In bagasse and liquid fuel furnaces, a furnace body which contains a battery of steam boilers,having in front a chamber for burning bagasse, and chambers for burning liquid fuel on each side of the chamber for burning bagasse,'said chambers being in an advanced position with regardto the furnace bodywhich contains the boilers, the front ends of these extending slightly over the chambers, and a tunnel situated across the fire bridges of the chambers, the outlets of said tunnel ending at opposite sides of the furnace with damper doors, and to which tunnel the burning gases incoming from the chambers do not have any access.

2.111 bagasse and liquid fuel furnaces, a furnace body inclosing a battery of steam boilers having in fronta chamber for burnin bagasse and a chamber for burning liqui fuel oneach side of the chamber for burning bagasse, the three said chambers being in an advanced relation with regard to the principal body of the furnace which contains the 3. In bagasse andliquid fuel furnaces, a

furnace body inclosing two steam boilers having in the front part of the furnace a bagasse burning chamberfthe rear wallof which is sloped inwardly, and a liquid fuel burning chamber on each side of the bagasse burning chamber, these three chambers being in an advanced relation with regard to the furnace body which incloses the steam boilers, the front ends of the steam boilers extending over the chambers and being supported by the covering thereon, a partition wall situated between the steam boilers separating them and extending towards the rear wall of the bagasse burning chamber, the front end of said partition wall ending in guiding surfaces-to lead the gasesincoming from the chambers; passways formed be tween the partition wall and the side walls of the bagasse burning chamber to admit the gases incoming from said bagasse chamber in two equal and independent volumes-separately toward the rear flues; a vault situated back of the rear fiues ofthe boilers and a cleaning tunnel situated across the fire bridge of the chambers transverse to the l furnace and which opens on bothsides ofthe furnace, said tunnel having damper doors on both sides affording access to the front and to the rear of the furnace.

In witness'whereof I afix my signature.

ROBERTO ALMAGRO. 7 7 

